VERY NICE AND INTERESTING REGISTERED COVER SENT FROM SAN SALVADOR (1 JUL 1931) TO BOGOTA (7 JUL 1931) VIA BUENAVENTURA (2 JUL 1931)BEARING 1, 5, 10 & 60 CENTAVOS OFFICIAL STAMPS OF EL SALVADORSPECIAL FLIGHT CACHET AND SIGNATURE OF THE POSTMASTER OF EL SALVADORCOLOMPHIL CERTIFICATE OF OPINION SIGNED BY DIETER BORTFELDTEXHIBITION PIECE. ROUGHLY OPEN. SCANS COMPLEMENT THE DESCRIPTION AND SHOW THE CONDITION OF THE ITEMSWE DO SHIP WORLDWIDE - NO COUNTRIES ARE EXCLUD...ED LOTS WILL BE MAILED IN THE NEXT FIVE BUSINESS DAYS UPON YOUR PAYMENT ARRIVAL. PACKAGES TO THE U. S. TAKE UP TO 12 DAYS AND TO THE REST OF THE WORLD UP TO 30 DAYS. PAYMENTS:PAYPALSHIPPING AND HANDLING CHARGES:FREE SHIPPING IN THE UNITED STATES. 3.00 AIR MAIL OUTSIDE THE UNITED STATES. 14.00 REGISTERED MAIL OUTSIDE THE UNITED STATES.THANKS FOR YOUR BIDS AND GOOD LUCK. S&C COLLECTIBLES.